Season 6 Episode 4 - Frozen

The SGC's study of the Antarctic Gate site reveals a woman buried in the ice who is revived and carries a disease. Dr. Frasier believes that she may be an Ancient but the woman, named Ayiana, is unable to speak although she can understand. When the team start falling to the disease, Ayiana manages to cure them with a special ability but it drains her each time and limits her ability to cure the others. She heals some the others while they're asleep but puts herself at the point of death before helping a deathly ill Jack. Ayiana dies and the Tok'ra offer a symbiote to help cure the dying Jack. They manage to get his okay and the Tok'ra takes him away.